JP3097660B2 - Washing machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a washing machine for washing, rinsing and dewatering clothes.

[0002]

2. Description of the Related Art Conventionally, this type of washing machine has been configured as shown in FIG. Hereinafter, the configuration will be described.

As shown in FIG. 1, a washing machine main body 1 is provided with a water receiving tub 3 supported by a suspension 2 therein.
A washing and dewatering tub 4 is rotatably provided in the water receiving tub 3, and the washing and dewatering tub 4 has an open top surface so that laundry can be put in from the top surface. Further, a stirring blade 5 is rotatably provided at the bottom, and has a large number of holes on the side surface.

As shown in FIG. 5, the washing and dewatering tub 4 is fixed to a dewatering shaft 7 supported by a bearing 6 provided on the bottom surface of the water receiving tub 3. Is fixed to a washing shaft 9 supported by a bearing 8 inside the inside. The washing shaft 9 is connected to a speed reduction mechanism 10, and a pulley 12 is attached to the speed reduction mechanism input shaft 11.

[0005] The mounting portion of the pulley 12 of the speed reduction mechanism input shaft 11 has four cut-out surfaces, and the mounting hole of the pulley 12 is formed in a shape that fits into the hole, thereby transmitting the rotational force of the pulley 12. The pulley 12 is connected to a motor 14 via a belt 13. Further, the speed reduction mechanism input shaft 11 has a clutch mechanism 15 for switching the rotation of the motor 14 to the washing shaft 9 or the dehydrating shaft 7 and transmitting the rotation.

In the above configuration, during the washing and rinsing steps,
Release the clutch driving means 15b of the clutch mechanism 15,
The rotation of the motor 14 is only transmitted to the stirring blade 5 via the washing shaft 9 and gives a mechanical force to the laundry. Thus, the washing and rinsing of the laundry stored in the washing and dewatering tub 4 proceeds.

In the dehydration process, the clutch driving means 15b of the clutch mechanism 15 is driven, and the rotation of the motor 14 is transmitted only to the washing and dewatering tub 4 via the dehydrating shaft 7, so that the entire washing and dewatering tub 4 is rotated. Rotates. The water content of the laundry, which has been washed and rinsed by the rotation of the washing and dewatering tub 4, is squeezed out into the water receiving tub 3 from a large number of holes provided on the side surface of the washing and dewatering tub 4 by centrifugal force. It is.
Thus, the laundry is automatically dehydrated.

[0008]

In such a conventional configuration, the speed reduction mechanism 1 is driven by the motor 14 via the belt 13.
Since the power is transmitted to 0, the number of parts increases to increase the washing capacity and the cleaning power, and the cost is high. There was an upper limit on the transmission torque due to a change in the tension of the belt 13 due to a change over time such as belt elongation or belt breakage, and it was not possible to obtain a transmission torque corresponding to a large capacity.

Further, since the heavy motor 14 and the speed reduction mechanism 10 are arranged side by side below the water receiving tub 3, the washing and dewatering tub 4 suspended in the washing machine main body 1 and the water receiving tub 3
And the center of gravity of the washing / dewatering tub 4 is deviated from the rotation center (the dehydrating shaft 7) of the washing and dewatering tub 4. Thus, when the washing and spin-drying tub 4 performs spin-drying, it tends to be unbalanced, and vibration due to spinning tends to increase. In addition, we use water called a washing machine and always use it under environmental conditions where there is water splash,
It is necessary to prevent the motor 14 from being deteriorated due to poor insulation, rust or the like.

The present invention has been made to solve the above-mentioned conventional problems, and reduces the number of parts and suppresses the occurrence of unbalance during dehydration in response to an increase in washing capacity.
Even if water overflows from the water receiving tank for some reason, the purpose is to prevent water from entering the inside of the motor, prevent water from entering from below, and improve safety. .

[0011]

SUMMARY OF THE INVENTION The present invention achieves the above-mentioned object, and comprises rotating a hollow dewatering shaft and a washing shaft arranged coaxially with the dewatering shaft by a motor so that the dewatering shaft can be used for washing and washing. While rotating the spin-drying tub, the rotation of the motor is reduced by the speed reduction mechanism, the washing shaft is rotated by the washing shaft, and the stirring blade disposed in the spin-drying tub is rotated. The motor bracket formed in a cup shape is attached to the speed reduction mechanism with the opening downward, the motor is configured in the motor bracket, the speed reduction mechanism and the motor are arranged on the same axis, and the opening of the motor bracket is opened. The part is covered with a motor cover provided with a louver.

Thus, it is possible to reduce the number of parts, suppress the occurrence of imbalance during dehydration in response to an increase in washing capacity, and to prevent water from overflowing from the water receiving tank for some reason. It is possible to prevent water from entering the inside of the motor, to prevent water from entering from below, to improve safety, and to secure a cooling air hole for the motor, Since the water that has dewed inside is discharged, the motor is durable, and the motor efficiency can be increased to reduce the size.

[0013]

DETAILED DESCRIPTION OF THE INVENTION The invention according to claim 1 of the present invention is characterized in that a dehydrating shaft for rotating a washing and dewatering tub, a stirring blade disposed in the washing and dewatering tub are rotated and the dehydrating shaft is rotated. A washing shaft arranged coaxially, a motor for rotating the dehydrating shaft and the washing shaft, a reduction mechanism for reducing the rotation of the motor to rotate the washing shaft, and transmitting the rotation of the motor to the dehydrating shaft a clutch mechanism for switching to, mosquitoes
Open the motor bracket with the opening down.
Attach the clutch mechanism inside the motor bracket
Forming the motor, inside the motor bracket
And a rotor is mounted on the inner peripheral side of the stator.
And the speed reduction mechanism and the motor are
It is arranged on one axis and the opening of the motor bracket is
Cover with a motor cover provided with a bar,
Louvers provided on the cover, coil stays motor of the motor
The motor bracket is formed in a motor bracket formed in a cup shape and the opening of the motor bracket is downward, so that there is no seam at the top of the motor bracket. Further, it is possible to prevent water overflowing from the water receiving tank from entering the motor. In addition, since the speed reduction mechanism and the motor are located on the same axis, the position of the center of gravity of the washing and dewatering tub and the water receiving tub can be matched with the rotation center of the washing and dewatering tub, thereby causing imbalance during dehydration. Can be suppressed, and the belt is not required, so that the problem caused by the belt can be solved, the number of parts can be reduced, and the assemblability can be improved.
In addition, by covering the opening of the motor bracket with a motor cover provided with a louver, it is possible to prevent water from entering from below, secure a cooling air hole for the motor, and to prevent water condensed inside. Is discharged, so that it is durable and can be downsized by increasing the motor efficiency.

Further, the louver provided on the motor cover is oriented so that the coil of the stator of the motor cannot be seen from outside, and water does not jump into the coil of the motor from the louver and adhere to the coil. Therefore, occurrence of insulation failure can be prevented.

According to a second aspect of the present invention, a hole is provided in a center portion of the motor cover, and the hole has a diameter larger than a size that a tool for turning a nut attached to a motor shaft can fit. Thereafter, a tool for turning a nut is attached to a hole provided at the center of the motor cover, and the rotor is driven externally, so that completion inspection and phase adjustment at the time of attaching the stirring blade can be easily performed.

According to a third aspect of the present invention, in the second aspect of the present invention, a rib is provided around a hole provided at the center of the motor cover, and the hole at the center of the motor cover is provided. Water can be prevented from entering.

[0017]

Embodiments of the present invention will be described below with reference to the drawings.

(Embodiment 1) As shown in FIG. 2, a washing machine main body 16 is provided with a water receiving tank 18 suspended by a suspension 17 so as to prevent dehydration vibration therein. A washing and dewatering tub 19 is rotatably disposed, and a stirring blade 20 for stirring the laundry is rotatably disposed at the inner bottom of the washing and dewatering tub 19.

The washing and dewatering tub 19 is, as shown in FIG.
The stirring blade 20 is fixed to the upper end of a dehydrating shaft 22 which is supported by a bearing 21 provided at the bottom of the water receiving tank 18.
It is disposed coaxially with the dewatering shaft 22 in the hollow portion of the dewatering shaft 22, and is fixed to the upper end of a washing shaft 24 supported by a bearing 23 provided in the hollow portion of the dewatering shaft 22. The lower end of the washing shaft 24 is connected to the output side of the speed reduction mechanism 25.

The motor bracket 26 is formed in a cup shape and is mounted on the speed reduction mechanism 25 with the opening portion down, and a stator 27b for applying a rotating magnetic field to a rotor 27a is press-fitted into the motor bracket 26, and the rotor 27 The motor 27 is constituted by opposing the motor 27a and the speed reduction mechanism 2
5 and the motor 27 are arranged on the same axis,
The rotation center of the rotor 27a of the motor 27 is connected to the speed reduction mechanism input shaft 28.

The clutch mechanism 29 switches the rotation of the motor 27 to either the dehydrating shaft 22 or the washing shaft 24. A clutch spring 29a is provided in a space provided inside the rotor 27a, and the clutch spring 29a is driven externally. A clutch driving means 29b is provided. The motor cover 30 is provided with a louver 30a so as to cover the opening 26a of the motor bracket 26.

The operation of the above configuration will be described. Washing,
In the rinsing stroke, the clutch driving means 29b of the clutch mechanism 29 releases the clutch spring 29a, and the dehydrating shaft 2
2 cannot transmit torque. The power of the motor 27 is only transmitted to the stirring blade 20 via the washing shaft 24, and gives a mechanical force to the laundry. Thus, the washing and rinsing of the laundry housed in the washing and dewatering tub 19 proceeds.

When the washing step is completed, a dehydration step is started. In this dehydration step, water in the washing and dewatering tub 19 is drained,
The clutch driving means 29b of the clutch mechanism 29 drives the clutch spring 29a so that a rotational force can be transmitted to the dehydrating shaft 22. As for the power of the motor 27, the speed reduction mechanism input shaft 28 and the dehydrating shaft 22 are connected, and the washing and dehydrating tub 19 rotates.

The rotation of the washing and dewatering tub 19 causes the moisture of the laundry, which has been washed and rinsed, to be condensed into the water receiving tub 18 through centrifugal force from a number of holes provided on the side of the washing and dewatering tub 19. Will be issued. Thus, the laundry is automatically dehydrated. In this manner, the laundry put into the washing / dewatering tub 19 automatically finishes the washing, rinsing, and dehydrating steps.

As described above, according to the present embodiment, the washing shaft 2
4. The dehydrating shaft 22 has a double structure in which the dehydrating shaft 22 is coaxial, and the speed reducing mechanism 25, the clutch mechanism 29, and the motor 27 are arranged in this order from the stirring blade 20 side. Are integrated, and the center of gravity is located at the center of the water receiving tank 18, so that the imbalance caused by the motor 27 not being at the center of the water receiving tank 18 as in the related art is eliminated, and vibration during dehydration can be suppressed. Further, since the speed reduction mechanism 25 and the dehydrating shaft 22 are directly rotated by the motor 27, a conventional belt is not required, and belt slip and durability can be eliminated.

A motor 27 is formed in a motor bracket 26 formed in a cup shape.
6, the opening of the motor bracket 26
In the case where there is no seam on the upper surface and the water overflows from the water receiving tank 18, the overflowing water can be prevented from entering the inside of the motor 27 and the motor bracket 26 becomes an integral part, so that the number of parts can be reduced. In addition, the assemblability can be improved, and the weight can be reduced.

The opening 26 of the motor bracket 26
is covered by the motor cover 30 provided with the louver 30a, the louver 30a of the motor cover 30 prevents water from entering from below and facilitates the intake of cooling air for the motor 27. The rise can be suppressed, the size of the motor 27 can be reduced, and the durability can be improved.

(Embodiment 2) As shown in FIG. 3, the motor bracket 31 is formed in a cup shape and is mounted on the speed reduction mechanism 25 with the opening downward, and a rotating magnetic field is applied to the rotor 32a in the motor bracket 31. The given stator 32b is press-fitted,
The motor 32 is configured with the rotor 32a opposed to the motor 32. The reduction mechanism 25 and the motor 32 are arranged on the same axis, and the rotor 32 of the motor 32 is connected to the reduction mechanism input shaft 28 of the reduction mechanism 25.
The center of rotation a is connected.

The motor cover 33 has a louver 33a, covers the opening 31a of the motor bracket 31, and has a hole 33b at the center of the motor cover 33.
Reference numeral 3b denotes a hole having a diameter larger than that of a tool for turning a nut 34 attached to the speed reduction mechanism input shaft (motor shaft) 28, and a rib 33c provided around the hole 33b.

The louver 33a provided on the motor cover 33 is provided with a coil 32c of a stator 32b of the motor 32.
Are oriented so that they cannot be seen through from the outside, the outermost louvers are directed outward, and the central louvers excluding the outermost are directed inward. Other configurations are the same as those in the first embodiment.

The operation of the above configuration will be described. A hole 33b is provided in the center of the motor cover 33, and this hole 33b
Since the diameter of the hole is larger than that of a tool for turning the nut 34 attached to the speed reduction mechanism input shaft 28 and the rib 33c is provided around the hole 33b, the center of the motor cover 33 is assembled after the motor 32 is assembled. By attaching a tool for turning the nut 34 to the hole 33b provided in the section and driving the rotor 32a externally, it is possible to easily perform completion inspection and phase adjustment when the stirring blade 20 is attached, improving workability and serviceability. can do.

Since the rib 33c is provided around the hole 33b, the hole 33 provided at the center of the motor cover 33 is provided.
b can prevent water from jumping in, and water
To prevent the occurrence of insulation failure and rust due to the penetration into the wire, thereby improving the durability.

A louver 33a provided on the motor cover 33 is provided with a coil 32c of a stator 32b of the motor 32.
Is oriented such that it cannot be seen through from the outside, so that water does not jump into the coil 32c of the motor 32 from the louver 33a and adheres to the coil 32c, thereby preventing the occurrence of insulation failure.

Further, since the louver 33a has the outermost louver facing outward, water that has entered the gap between the motor bracket 31 and the motor cover 33 is not covered by the motor cover 33.
At the center of the motor 32, and can be prevented from being wound up by the rotation of the motor rotor 32a and scattered into the motor 32.

Further, since the central louver except the outermost portion is directed inward, the rotation of the rotor 32a of the motor causes the wind to be directed from the inward louver in the central portion, so that external water is sucked from the louver. The motor 32
Of the stator 32b.
Can prevent water from entering the insulation and causing poor insulation and rust.
Durability can be improved.

(Embodiment 3) As shown in FIG. 4, the motor bracket 26 is formed in a cup shape and attached to a speed reduction mechanism with an opening facing down, and a rotating magnetic field is applied to the rotor 27a in the motor bracket 26. A motor 27 is formed by press-fitting a stator 27b, and a rotor 27a is opposed to the stator 27b. A reduction mechanism and the motor 27 are arranged on the same axis. The motor cover 34 is provided with a louver 34a.
6, and the outermost peripheral portion 34f of the motor cover 34 is one step lower than the inner peripheral portion. Other configurations are the same as those in the first embodiment.

The operation of the above construction will be described. The water that has entered the gap between the motor bracket 26 and the motor cover 34 collects at the outermost peripheral portion 34f and is not taken up by the rotation of the rotor 27a of the motor. Scattered, it is possible to prevent poor insulation and rust of the motor 27 from occurring, and to improve durability.

In this embodiment, the opening 26a of the motor bracket 26 of the first embodiment is covered with the motor cover 34, and the outermost peripheral portion 34f of the motor cover 34 is one step lower than the inner peripheral portion. It goes without saying that the outermost peripheral portion of the motor cover that covers the opening 31a of the motor bracket 31 of the second embodiment may be one step lower than the inner peripheral portion.

(Embodiment 4) As shown in FIG. 5, the motor bracket 35 is formed in a cup shape and is mounted on a speed reduction mechanism with an opening portion downward, and a rotating magnetic field is applied to the rotor 32a in the motor bracket 35. A motor 32 is formed by press-fitting a stator 32b, and a rotor 32a is opposed to the stator 32b. The speed reduction mechanism and the motor 32 are arranged on the same axis. The motor cover 36 is provided with a louver 36a.
5 cover the opening 35a.

The connector section 37 is connected to the motor 32. The connector section 37 is held between the motor bracket 35 and the motor cover 36 and held.
The lead wire 38 coming out of the motor cover 36 is fixed to a fixed position 36g formed by drawing on the motor cover 36. The fixed position 36g of the lead wire 38 is provided below the position coming out of the connector portion 37. Other configurations are the same as those in the first or second embodiment.

The operation of the above configuration will be described. Since the lead wire 38 coming out of the connector portion 37 is routed below the position of the connector portion 37, it is possible to prevent water from entering the connector portion 37 along the lead wire 38. Thus, it is possible to prevent water from invading the connector portion 37 and to cause insulation failure, thereby improving durability.

Since the fixing position 36g for fixing the lead wire 38 to the motor cover 36 is formed by restricting the motor cover 36, the fixing position 36g can be formed with a simple structure. Water can be easily drained.

Since the connector 37 is held between the motor bracket 35 and the motor cover 36, the connector 37 can be fixed simultaneously by attaching the motor cover 36 to the motor bracket 35. , Workability can be improved.

(Embodiment 5) As shown in FIG. 6, a motor bracket 39 is formed in a cup shape and attached to a speed reduction mechanism with an opening facing down, and a rotating magnetic field is applied to the rotor 32a in the motor bracket 39. A motor 32 is formed by press-fitting a stator 32b, and a rotor 32a is opposed to the stator 32b. The speed reduction mechanism and the motor 32 are arranged on the same axis. The motor cover 40 is provided with a louver 40a.
9 opening 39a.

The connector 37 is connected to the motor 32. The connector 37 is held between the motor bracket 39 and the motor cover 40 via the elastic body 41, and the lead wire 38 coming out of the connector 37 is held. Is fixed to a fixed position 40 g formed on the motor cover 40. Other configurations are the same as those of the fourth embodiment.

The operation of the above configuration will be described. The connector 37 is connected to the motor bracket 39 via the elastic body 41.
And the motor cover 40, so that the connector 37 is connected to the motor bracket 39 and the motor cover 4.
When it is clamped at 0, variations in the gap between the motor bracket 39 and the motor cover 40 can be absorbed, and assemblability can be improved.

[0047]

As described above, according to the present invention, the number of parts can be reduced, and the occurrence of imbalance during dehydration can be suppressed in response to an increase in washing capacity.
Even if water overflows from the water receiving tank for some reason, water can be prevented from entering the inside of the motor, water can be prevented from entering from below, and safety can be improved. In addition, a cooling air hole for the motor can be ensured, and water condensed is discharged inside, so that the motor is durable and the motor efficiency is increased, thereby enabling downsizing.

[Brief description of the drawings]

FIG. 1 is a sectional view of a main part of a washing machine according to a first embodiment of the present invention.

FIG. 2 is a sectional view of the washing machine.

FIG. 3 is a sectional view of a main part of a washing machine according to a second embodiment of the present invention.

FIG. 4 is a sectional view of a main part of a washing machine according to a third embodiment of the present invention.

FIG. 5 is a sectional view of a main part of a washing machine according to a fourth embodiment of the present invention.

FIG. 6 is a sectional view of a main part of a washing machine according to a fifth embodiment of the present invention.

FIG. 7 is a sectional view of a conventional washing machine.

FIG. 8 is an enlarged sectional view of a main part of the washing machine.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 19 Washing and dewatering tank 20 Stirring blade 22 Dehydration shaft 24 Washing shaft 25 Reduction mechanism 26 Motor bracket 26a Opening 27 Motor 29 Clutch mechanism 30 Motor cover 30a Louver

──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Norimasa Kondo 1006 Kadoma Kadoma, Osaka Prefecture Inside Matsushita Electric Industrial Co., Ltd. (56) References JP-A-57-39879 (JP, A) JP-A-2-237596 (JP, A) JP-A-6-169542 (JP, A) JP-A-8-66581 (JP, A) JP-A-4-38145 (JP, A) JP-A-2-65074 (JP, U) Jiko 63-21167 (JP, Y2) (58) Fields investigated (Int. Cl. ⁷ , DB name) D06F 37/40 H02K 5/04

Claims (3)

(57) [Claims] A dehydrating shaft for rotating a washing and dewatering tub; a washing shaft for rotating a stirring blade disposed in the washing and dewatering tub and disposed coaxially with the dewatering shaft; A motor for rotating the washing shaft, a deceleration mechanism for reducing the rotation of the motor to rotate the washing shaft, and a clutch mechanism for switching the rotation of the motor to be transmitted to the dehydrating shaft ; Open the motor bracket
To the inside of the motor bracket.
Forming a latch mechanism, wherein the motor is mounted on the motor bracket;
The stator is mounted inside the
The rotor is opposed to the side, and the speed reduction mechanism and the motor
Motor on the same axis and open the motor bracket.
Cover the mouth with a motor cover with a louver,
The louver provided on the motor cover is a motor stay.
The coil of the motor so that it cannot be seen through from the outside.
Washing machine. 2. A dewatering shaft for rotating a washing and dewatering tub, a washing shaft for rotating a stirring blade disposed in the washing and dewatering tub and disposed coaxially with the dewatering shaft, and A motor for rotating the washing shaft, a deceleration mechanism for reducing the rotation of the motor to rotate the washing shaft, and a clutch mechanism for switching the rotation of the motor to be transmitted to the dehydrating shaft ; Open the motor bracket
To the inside of the motor bracket.
Forming a latch mechanism, wherein the motor is mounted on the motor bracket;
The stator is mounted inside the
The rotor is opposed to the side, and the speed reduction mechanism and the motor
Motor on the same axis and open the motor bracket.
Cover the mouth with a motor cover with a louver,
A hole is provided in the center of the motor cover, and the hole is
The hole diameter is larger than the size that the tool for turning the nut attached to
Washing machine made bigger . 3. Around a hole provided in a center portion of a motor cover.
3. The washing machine according to claim 2, wherein a rib is provided on the washing machine.